1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet.network.util;
24  
25  import com.liferay.portal.kernel.util.Time;
26  import com.liferay.portal.kernel.webcache.WebCacheException;
27  import com.liferay.portal.kernel.webcache.WebCacheItem;
28  import com.liferay.portlet.network.model.DNSLookup;
29  
30  import java.net.InetAddress;
31  
32  /**
33   * <a href="DNSLookupWebCacheItem.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Brian Wing Shun Chan
36   */
37  public class DNSLookupWebCacheItem implements WebCacheItem {
38  
39      public DNSLookupWebCacheItem(String domain) {
40          _domain = domain;
41      }
42  
43      public Object convert(String key) throws WebCacheException {
44          DNSLookup dnsLookup = null;
45  
46          try {
47              String results = null;
48  
49              char[] array = _domain.trim().toCharArray();
50  
51              for (int i = 0; i < array.length; i++) {
52                  if ((array[i] != '.') && !Character.isDigit(array[i])) {
53                      InetAddress ia = InetAddress.getByName(_domain);
54  
55                      results = ia.getHostAddress();
56  
57                      break;
58                  }
59              }
60  
61              if (results == null) {
62                  StringBuilder sb = new StringBuilder();
63  
64                  InetAddress[] ia = InetAddress.getAllByName(_domain);
65  
66                  for (int i = 0; i < ia.length; i++) {
67                      sb.append(ia[i].getHostName());
68  
69                      if (i + 1 <= ia.length) {
70                          sb.append(",");
71                      }
72                  }
73  
74                  results = sb.toString();
75              }
76  
77              dnsLookup = new DNSLookup(_domain, results);
78          }
79          catch (Exception e) {
80              throw new WebCacheException(_domain + " " + e.toString());
81          }
82  
83          return dnsLookup;
84      }
85  
86      public long getRefreshTime() {
87          return _REFRESH_TIME;
88      }
89  
90      private static final long _REFRESH_TIME = Time.DAY;
91  
92      private String _domain;
93  
94  }